6
4.2.2.1 Supply voltages and thermostatic control circuit 81
4.2.2.2 Supply voltages for IR signal processing circuit 81
4.2.3 Test points IR-ranges 83
4.2.3.1 Supply voltages for IR signal processing circuit 83
4.2.3.2 Outputs (base lines about 8VDC. For golden paths adjust 6VDC) 83
4.2.4 Base line adjustments 84
4.2.5 Infrared cell board IRC1.x sections assignment 84
4.2.5.1 Explanations 84
4.2.5.2 Example 84
4.2.6 Voltage of a base line is too high (higher than 9.5V) 85
4.2.6.1 Source voltage – reducing 85
4.2.6.2 Drift too large 86
4.2.7 IR source voltage setting 87
4.2.8 IR cell temperature control 88
4.2.8.1 Examples 88
4.2.8.2 Modifications for higher sensitivity (gain) in the low sulphur range 89
4.2.8.3 IRC board and cross-talk 89
4.3 Pneumatics 90
4.3.1 Pneumatics adjusting for correct furnace movement 92
4.4 Pressure regulation 93
4.5 Purge pressure 94
4.6 Closing cone adjustment 96
4.7 Linearisation 97
4.8 Balance programming 97
4.9 Induction generator control 97
5 Service ................................................................................................................................................. 100
5.1 IR-paths, cleaning and replacing 100
5.1.1 Available infrared paths 101
5.2 Infrared electronics 102
5.3 General test points 103
5.3.1 Supply voltages and thermostatic control circuit 103
5.3.2 Supply voltages for IR signal processing circuit 103
5.4 IR-Channels test points 104
5.4.1 Supply voltages for IR signal processing circuit 104
5.4.2 Outputs (base lines about 8VDC. Less no problem) 104
5.5 Infrared power supply 105
5.6 IR-source 106
5.7 Leak checking 108
5.7.1 Furnace inlet system - leaks 111
5.7.1.1 Leaks in the furnace 111
5.7.1.2 Leaks in the furnace outlet system 111
5.7.1.3 Leaks inside the analyzer 111
5.8 Solenoid valves cleaning 112
5.9 Flow sensor - replacing / cleaning 113
5.9.1 Flow sensor replacing 113
5.10 Furnace pneumatics - additional safety features (optional) 114
5.11 Halogen trap - installing 115
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